Organic Globules in the Tagish Lake Meteorite: Remnants of the Protosolar Disk
Coordinated transmission electron microscopy and isotopic measurements of organic globules in the Tagish Lake meteorite shows that they have elevated ratios of nitrogen-15 to nitrogen-14 (1.2 to 2 times terrestrial) and of deuterium to hydrogen (2.5 to 9 times terrestrial). These isotopic anomalies...
Published in: | Science |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Association for the Advancement of Science (AAAS)
2006
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1126/science.1132175 https://www.science.org/doi/pdf/10.1126/science.1132175 |
id |
craaas:10.1126/science.1132175 |
---|---|
record_format |
openpolar |
spelling |
craaas:10.1126/science.1132175 2024-06-23T07:57:06+00:00 Organic Globules in the Tagish Lake Meteorite: Remnants of the Protosolar Disk Nakamura-Messenger, Keiko Messenger, Scott Keller, Lindsay P. Clemett, Simon J. Zolensky, Michael E. 2006 http://dx.doi.org/10.1126/science.1132175 https://www.science.org/doi/pdf/10.1126/science.1132175 en eng American Association for the Advancement of Science (AAAS) Science volume 314, issue 5804, page 1439-1442 ISSN 0036-8075 1095-9203 journal-article 2006 craaas https://doi.org/10.1126/science.1132175 2024-06-13T04:01:19Z Coordinated transmission electron microscopy and isotopic measurements of organic globules in the Tagish Lake meteorite shows that they have elevated ratios of nitrogen-15 to nitrogen-14 (1.2 to 2 times terrestrial) and of deuterium to hydrogen (2.5 to 9 times terrestrial). These isotopic anomalies are indicative of mass fractionation during chemical reactions at extremely low temperatures (10 to 20 kelvin), characteristic of cold molecular clouds and the outer protosolar disk. The globules probably originated as organic ice coatings on preexisting grains that were photochemically processed into refractory organic matter. The globules resemble cometary carbon, hydrogen, oxygen, and nitrogen (CHON) particles, suggesting that such grains were important constituents of the solar system starting materials. Article in Journal/Newspaper Tagish AAAS Resource Center (American Association for the Advancement of Science) Tagish ENVELOPE(-134.272,-134.272,60.313,60.313) Tagish Lake ENVELOPE(-134.233,-134.233,59.717,59.717) Science 314 5804 1439 1442 |
institution |
Open Polar |
collection |
AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Coordinated transmission electron microscopy and isotopic measurements of organic globules in the Tagish Lake meteorite shows that they have elevated ratios of nitrogen-15 to nitrogen-14 (1.2 to 2 times terrestrial) and of deuterium to hydrogen (2.5 to 9 times terrestrial). These isotopic anomalies are indicative of mass fractionation during chemical reactions at extremely low temperatures (10 to 20 kelvin), characteristic of cold molecular clouds and the outer protosolar disk. The globules probably originated as organic ice coatings on preexisting grains that were photochemically processed into refractory organic matter. The globules resemble cometary carbon, hydrogen, oxygen, and nitrogen (CHON) particles, suggesting that such grains were important constituents of the solar system starting materials. |
format |
Article in Journal/Newspaper |
author |
Nakamura-Messenger, Keiko Messenger, Scott Keller, Lindsay P. Clemett, Simon J. Zolensky, Michael E. |
spellingShingle |
Nakamura-Messenger, Keiko Messenger, Scott Keller, Lindsay P. Clemett, Simon J. Zolensky, Michael E. Organic Globules in the Tagish Lake Meteorite: Remnants of the Protosolar Disk |
author_facet |
Nakamura-Messenger, Keiko Messenger, Scott Keller, Lindsay P. Clemett, Simon J. Zolensky, Michael E. |
author_sort |
Nakamura-Messenger, Keiko |
title |
Organic Globules in the Tagish Lake Meteorite: Remnants of the Protosolar Disk |
title_short |
Organic Globules in the Tagish Lake Meteorite: Remnants of the Protosolar Disk |
title_full |
Organic Globules in the Tagish Lake Meteorite: Remnants of the Protosolar Disk |
title_fullStr |
Organic Globules in the Tagish Lake Meteorite: Remnants of the Protosolar Disk |
title_full_unstemmed |
Organic Globules in the Tagish Lake Meteorite: Remnants of the Protosolar Disk |
title_sort |
organic globules in the tagish lake meteorite: remnants of the protosolar disk |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1126/science.1132175 https://www.science.org/doi/pdf/10.1126/science.1132175 |
long_lat |
ENVELOPE(-134.272,-134.272,60.313,60.313) ENVELOPE(-134.233,-134.233,59.717,59.717) |
geographic |
Tagish Tagish Lake |
geographic_facet |
Tagish Tagish Lake |
genre |
Tagish |
genre_facet |
Tagish |
op_source |
Science volume 314, issue 5804, page 1439-1442 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.1132175 |
container_title |
Science |
container_volume |
314 |
container_issue |
5804 |
container_start_page |
1439 |
op_container_end_page |
1442 |
_version_ |
1802650559244664832 |